A spreading perennial weed with a rattlesnake-like tuber that's very hard to get rid of once it settles in.

Look for square stems and white or pink flowers in spring. The real giveaway is underground: a white, segmented tuber that looks just like a rattlesnake rattle. It spreads aggressively through underground rhizomes, making it tough to contain.
Most visible and actively growing from fall through spring. It dies back in the heat of summer, so summer is not the time to deal with it. It's been spreading further into the Piedmont in recent years.
Shows up in home lawns and landscape beds throughout the Triangle.

A winter weed with sharp seed pods that hurt bare feet in spring. It's becoming more common in Triangle lawns.

A tough perennial weed that loves compacted, thin lawns and sticks around all year.

A winter weed that pops up in thin lawns, covering them in purple flowers by late winter.

A cool-season weed grass that pops up bright green in winter lawns, then dies off and leaves bare patches by summer.